"Athletics International Track and Field Facilities Standard Manual" stipulates that the inner ring of the standard sports track is 400 meters long, of which the curve radius should be 36.5 meters. The straight road should avoid the dazzling influence of the sun's position in the north and south direction. There should be 8 runways on the curve, each runway is 1.22 meters wide, and there are 10 runways on the straight path. The safety area on the inner side of the runway is not less than 1 meter, and it is best to have a safety area of 1 meter on the outside. The starting area is at least 3 meters, the sprint buffer area is at least 17 meters, the maximum left and right slope of the runway shall not exceed 1:1000, and the downward slope of the running direction shall not exceed 1:1000. The design method of the
400m standard runway is as follows:
1. The international standard 400m runway is divided into two semicircles and two straight runways. The radius of the two semicircles is 36.5 meters, and the length of the straight line is 84.39 meters.
1.1 Calculation of curve length
6 The sum of the two curve lengths of semicircular track and field fields is exactly equal to the circumference of a circle. According to the circumferential formula C=2πr, the length of the two bends of the first lane (calculated line length) is:
2 * 3.1416 * (36.5+0.30) m = 231.22176 m (0.3 is the offset of the inner line of the first runway by 0.3 meters)
1.2 Calculation of straight section length
Two straight section lengths = full length of runway - two curve lengths
=400 - 231.22176 m = 168.77824 m
One straight section length is 168.77824 m / 2 = 84.38912 m
1.3 Calculation of the full length of runway full length of runway = two bends + two straight section length
= 231.22176m + 168.77824m
= 400 m
2. The runway is divided into 8 bends, and the straight path has 8 to 10 bends. Therefore, the track width is set to 1.22 meters. The starting areas of
3, 100 meters and 110 meters hurdles should be designed in the western part of the straight road. Generally speaking, the starting area should be set at least 3 meters. The minimum buffer running area set at the end shall not be less than 17 meters. The range of motion of
4, long jump and triple jump can be set on the east side of the runway.
5. Javelins should be set in the two semicircles, discus , strap , pole vault and high jump competition venue.
6. The middle of the venue is generally used to set up a football match venue. It is generally believed that the standard length is 105 meters and the width is 68 meters. It should be noted that no less than 2 meters of barrier-free area should be reserved outside the end line of the football field to ensure safety.
7. Calculation of the length of each lane curve (taking the lane width d=1.22 meters as an example)
According to the circumference formula C = 2πr
Cn = 2π [r+(n-1)d+0.20]
(C represents the curve circumference, n represents the lane radius, and d represents the lane width)
8. Calculation before the starting line extends
If both lane athletes run on their own lane for one week, then the athletes in the second lane will run 2*3.1416*1.22 = 7.6655m more than the athletes in the first lane. In order to make the distance between the second part and the first part runner running the athlete, the starting point must be extended a distance forward. The distance that should be extended forward is called the number of forward extensions of the starting line. The method of calculating the forward extension of the starting line is to minus the curve length of a certain segment of the lane, which is the number of forward extensions of the starting line of the lane. The formula is as follows:
Wn=2π[r+(n-1)+0.20]-2π(r+0.30)
9. How to mark the starting point of each runway of 400 meters
Drawing → Arc: center, starting point, length → Center of the circle select the common center of the curve, and the starting point selects the first starting point to extend the center point of a corresponding runway. Length input: 766.55
(Arc length Modification operation: len→T→Select the object that needs to be modified in length → Enter the length)
Related detailed dimensions jpg and dwg share:
Link: https://pan.baidu.com/s/13lsZF_TaYL4Y1X7oKwe9wA
Extraction code: wuhn
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